CN215315752U

CN215315752U - Clamp for machining wind power main shaft

Info

Publication number: CN215315752U
Application number: CN202120972364.1U
Authority: CN
Inventors: 高欣; 薛松; 汪鹏; 高汝峰
Original assignee: Jiangyin Nangong Forging Co ltd
Current assignee: Jiangyin Nangong Forging Co ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-12-28
Anticipated expiration: 2031-05-08

Abstract

The utility model relates to a clamp for processing a wind power main shaft, which comprises a chuck and a rack; the chuck comprises a clamping jaw support, and the clamping jaw support is a hollow hexagonal prism; the air cylinders are fixed on three side surfaces of the clamping jaw support; a guide shaft is fixed on the clamping jaw bracket at the horizontal position of each air cylinder; a clamping jaw is arranged at the extending end of each cylinder; a rotating shaft penetrates through the center of the clamping jaw support, and the clamping jaw support can correspondingly rotate by the rotation of the rotating shaft; the rack is arranged on a lathe, a sleeve is arranged at the top of the rack, and a shaft shell penetrates through the sleeve; a shaft sleeve which moves axially is arranged in the shaft shell, a screw rod is arranged in one end of the shaft sleeve, and the rotating shaft is sleeved in the other end of the shaft sleeve; and an adjusting nut is fixed inside the shaft sleeve. The clamping device can accurately clamp the inner hole of the wind power main shaft, prevents the inner hole from being worn in the machining process, is simple in design and easy to use, and ensures the machining precision of the wind power main shaft.

Description

Clamp for machining wind power main shaft

Technical Field

The utility model relates to the technical field of machining, in particular to a clamp for machining a wind power main shaft.

Background

The main shaft of the wind driven generator is an important part for connecting a fan fin and a fan base. When a common wind power main shaft is machined by a lathe, the length of a workpiece is long, and the wind power main shaft can be machined only by using a top tip to firmly clamp the wind power main shaft. One end of the shaft end of the wind power main shaft is fixed on the lathe main shaft through the clamping jaw, one end of the flange side is pushed into the inner hole through the tip, but the high-precision wind power main shaft is high in machining precision, and the tip is easy to abrade the inner hole during machining. However, when the clamping jaw chuck or the chuck is used for supporting the inner hole of the flange end, the clamping jaw is manually adjusted to easily cause overlarge or undersize clamping force, the overlarge clamping force can wear the precision of a workpiece, and the undersize clamping force can cause jumping during workpiece processing to cause scrapping.

Therefore, a clamp with proper clamping force is needed for machining the wind power main shaft.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a clamp for machining a wind power main shaft, which can clamp an inner hole of the wind power main shaft.

In order to achieve the purpose of the utility model, the utility model provides a clamp for processing the wind power main shaft, which comprises a chuck, a rack and a sleeve;

the chuck comprises a clamping jaw support, and the clamping jaw support is a hollow hexagonal prism; the air cylinders are fixed on three side surfaces of the clamping jaw support; a guide shaft is fixed on the clamping jaw bracket at the horizontal position of each air cylinder; a clamping jaw is arranged at the extending end of each cylinder; the clamping jaw is connected with the guide shaft, a rotating shaft is fixed at the center of the clamping jaw bracket,

the rack is connected to the lathe body in a sliding manner; the sleeve is arranged at the top end of the rack; a bearing is arranged in the sleeve; one end of the rotating shaft is rotatably connected in the sleeve;

further, the rack is fixed on a tail frame of the lathe, and a shaft shell penetrates through the sleeve; the shaft shell is fixed in the sleeve; a shaft sleeve which moves axially is arranged in the shaft shell, a screw rod is arranged in one end of the shaft sleeve, and the rotating shaft is sleeved in the other end of the shaft sleeve; an adjusting nut matched with the screw thread is fixed inside the shaft sleeve; and a bearing matched with the rotating shaft is arranged in the shaft sleeve.

Preferably, each clamping jaw outer side face is arc-shaped, and the length of the clamping jaw is greater than that of the clamping jaw support.

Preferably, a limiting spring is arranged in the shaft sleeve on one side of the adjusting nut; one end of the limiting spring is fixed on the adjusting nut, and the other end of the limiting spring is connected with the end cover of the shaft sleeve.

Preferably, a hand wheel is connected to one end of the screw rod outside the shaft shell, and a handle is arranged on the hand wheel.

Preferably, the cylinder is a thin cylinder.

The working principle is as follows: a hand wheel rotates to enable a screw to rotate, an adjusting nut matched with the screw axially moves along with the screw, the adjusting nut is fixed on a shaft sleeve, so that the shaft sleeve and a rotating shaft fixed in the shaft sleeve move along with the adjusting nut, and the rotating shaft can only move along a preset position due to the fact that a limiting spring is arranged beside the adjusting nut. After the chuck is placed in an inner hole of the wind power main shaft, the air cylinder is started, the air cylinder pushes the clamping jaw to be attached to the wall of the inner hole to a proper position, the bearing is installed inside the shaft sleeve, so that the rotating shaft can rotate in the shaft sleeve, and after the lathe is started, the chuck rotates along with the wind power main shaft when the wind power main shaft rotates.

Compared with the prior art, the fixture for machining the wind power main shaft has the following advantages that:

(1) the clamping jaws are pushed by the air cylinder to clamp the inner hole, and the wind power main shaft is clamped under the condition that the inner hole is not abraded;

(2) the surface of the clamping jaw is arc-shaped, so that the clamping area is increased, and the machining precision is ensured;

(3) the design is simple, and easy to use.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic view of a chuck structure;

FIG. 3 is a schematic view of inner bore clamping;

FIG. 4 is a schematic view of the inside of the sleeve according to example 2.

Detailed Description

The utility model is further described below with reference to the following figures and specific examples.

Example 1:

as shown in fig. 1 to 3, a fixture for processing a wind power main shaft comprises a chuck 1 and a rack 21;

the chuck 1 comprises a jaw support 11; the clamping jaw support 11 is a hollow hexagonal prism; air cylinders 12 are fixed on three side surfaces of the clamping jaw support 11, wherein the three side surfaces are preferably two-by-two non-adjacent side surfaces, and the air cylinders 12 are preferably thin air cylinders 12; a guide shaft 13 is fixed on the clamping jaw bracket 11 at the horizontal position of each air cylinder 12; a clamping jaw 14 is arranged at the extending end of each cylinder 12, and the clamping jaw 14 is connected with the guide shaft 13; the guide shaft 13 is used for supporting the clamping jaw 14, so that the cylinder 12 is prevented from being abraded, the cylinder 12 does not need to be placed, and the cost is saved; the type of the cylinder 12 is selected according to the size of the inner hole, the stroke of the cylinder 12 is controlled, so that after a piston rod of the cylinder 12 extends out, the clamping jaw 14 is attached to the inner hole to clamp a workpiece, and the pressure on the inner hole is not too large or too small; a rotating shaft 15 is fixed at the center of the clamping jaw support 11, and one end of the rotating shaft 15 extends out of the clamping jaw support 11;

the rack 21 is connected to the lathe body in a sliding manner; the top of the stand 21 is provided with a sleeve 22; a bearing is arranged in the sleeve 22; one end of the rotating shaft 15 is rotatably connected in the sleeve 22; when the workpiece is hung on the lathe, the stand 21 fixes the stand 21 to the lathe after the jaw holder 11 is placed in the workpiece inner hole.

Example 2:

as shown in fig. 4, the stand 21 is fixed to a tailstock of a lathe; a shaft shell 23 penetrates through the sleeve 22; the shaft housing 23 is fixed in the sleeve 22; a shaft sleeve 24 which moves axially is arranged in the shaft shell 23, a screw rod 25 is arranged in one end of the shaft sleeve 24, and the rotating shaft 15 is sleeved in the other end of the shaft sleeve; an adjusting nut 26 which is matched with the screw 25 in a threaded manner is fixed inside the shaft sleeve 24, the adjusting nut 26 can drive the shaft sleeve 24 to axially move by rotating the screw 25, and the rotating shaft 15 also axially moves along with the shaft sleeve 24; a bearing matched with the rotating shaft 15 is arranged in the shaft sleeve 24, and the rotating shaft 15 can rotate in the shaft sleeve 24; other features are the same as those of embodiment 1.

Through the improvement to embodiment 1, can just rotate the screw rod alright make the pivot axial displacement, need not to remove the rack again, save process time, prolong the lathe life-span.

In embodiment 1 or 2, each outer side surface of the clamping jaw 14 is arc-shaped, the length of the clamping jaw 14 is greater than that of the clamping jaw bracket 11, the contact area between the clamping jaw 14 and the inner hole is increased, and the linear contact is changed into the surface contact, so that the inner hole is prevented from being abraded.

In embodiment 2, a limit spring 27 is arranged in the shaft sleeve 24 on one side of the adjusting nut 26; one end of the limiting spring 27 is fixed on the adjusting nut 26, and the other end is connected with the end cover of the shaft sleeve 24; the limiting spring 27 is used for limiting the movement of the shaft sleeve 24 and preventing the shaft sleeve 24 from separating from the adjusting nut 26 and the shaft sleeve 24 to drive the chuck to collide with the shaft shell 23 when moving axially.

In embodiment 2, a hand wheel 28 is connected to one end of the screw rod 25 outside the shaft housing 23, the hand wheel 28 is provided with a handle 29, and the hand wheel 28 can rotate by manually rotating the handle 29, so that the screw rod 25 can rotate, and the rotating shaft 15 and the chuck 1 can axially move.

The application method of embodiment 2 of the utility model comprises the following steps: the wind power main shaft is hung on a lathe by a travelling crane, the end part of the shaft is firmly clamped by a clamping jaw chuck, then a handle 29 is rotated, the chuck 1 is placed in the inner hole of the large flange, the clamping jaw 14 completely enters the inner hole, the cylinder 12 is opened, the piston rod of the cylinder 12 pushes the clamping jaw 14 to enable the clamping jaw 14 to push to a proper position, the three clamping jaws 14 simultaneously push against the wall of the inner hole, and the lathe is opened for processing.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the utility model is not limited to the embodiments disclosed, but is capable of various modifications and substitutions without departing from the spirit of the utility model.

Claims

1. A clamp for processing a wind power main shaft is characterized by comprising a chuck and a rack;

the chuck comprises a clamping jaw support, and the clamping jaw support is a hollow hexagonal prism; the air cylinders are fixed on three side surfaces of the clamping jaw support; a guide shaft is fixed on the clamping jaw bracket at the horizontal position of each air cylinder; a clamping jaw is arranged at the extending end of each cylinder; the clamping jaw is connected with the guide shaft; a rotating shaft penetrates through the center of the clamping jaw support;

the rack is arranged on a lathe, and the top of the rack is provided with a sleeve.

2. The jig for machining the wind power main shaft is characterized in that the rack is connected to a lathe body in a sliding mode; a bearing is arranged in the sleeve; one end of the rotating shaft is rotatably connected in the sleeve.

3. The clamp for machining the wind power main shaft according to claim 1, wherein the rack is fixed on a lathe; a shaft shell penetrates through the sleeve; a shaft sleeve moving axially is arranged in the shaft shell; a screw is arranged in one end of the shaft sleeve, and the rotating shaft is sleeved in the other end of the shaft sleeve; an adjusting nut matched with the screw thread is fixed inside the shaft sleeve; and a bearing matched with the rotating shaft is arranged in the shaft sleeve.

4. The clamp for machining the wind power main shaft according to any one of claims 1 or 2, wherein the outer side face of each clamping jaw is arc-shaped; the length of the clamping jaw is larger than that of the clamping jaw bracket.

5. The clamp for machining the wind power main shaft according to claim 3, wherein a limiting spring is arranged in the shaft sleeve on one side of the adjusting nut; one end of the limiting spring is fixed on the adjusting nut, and the other end of the limiting spring is connected with the end cover of the shaft sleeve.

6. The clamp for machining the wind power main shaft according to claim 5, wherein a hand wheel is connected to one end of the screw rod outside the shaft shell, and a handle is arranged on the hand wheel.

7. The clamp for machining the wind power main shaft according to claim 1, wherein the air cylinder is a thin air cylinder.